2 Corinthians 2:3

And I wrote this same unto you Either (1) the announcement in 1 Corinthians 16:7 of the Apostle's change of purpose, or (2) the rebukes in the former Epistle that grieved them, especially the passage in ch. 5 of that Epistle which (cf. also 2 Corinthians 2:2; 2 Corinthians 2:5of this chapter) refers to a single person. The former agrees best with the context. In 2 Peter 1:5, however, (3) the words here translated -this same" are translated -beside this."

I should have sorrow from them of whom I ought to rejoice St Paul hoped by his letter to produce such an effect that those who were blamed in it would abandon their sin. He oughtto rejoice in such persons, for his rejoicing is to see them -walk worthy of the vocation wherewith they were called" (Ephesians 4:1; cf. 1 Thessalonians 3:8); and this, by virtue of their union with Christ, they might do if they would. Had he come, instead of writing, they must have caused him sorrow and not joy by the inconsistency of their Christian walk. Cf. ch. 2 Corinthians 12:21.

having confidence in you all, that my joy is the joy of you all Cf. ch. 2 Corinthians 7:16. The Apostle still keeps in view that on which he had lately insisted, the identity of his feelings, hopes, aspirations with those of the Corinthians in virtue of their common life in Christ (see note on 1 Corinthians 1:9). His joy and theirs is to see the members of the Corinthian community entirely led by the Spirit of Christ (Romans 8:14) and producing the fruit of the Spirit (Galatians 5:22) in all their actions. See John 15:11.